AARDVARK EXPERTS

When I tried to install the Sonar 4 update, Sonar wouldn’t recognize my aardvark lx6 soundcard. I think it might be the driver version I am using but so far, everywhere someone has told me to look for the driver has turned out to be a dead end. Has anyone had succsess running Sonar 4 with the lx6? Can anyone point me in the right direction. I have two of the aardvark cards on two different machines so the stakes are kind of high for me.